In this May 2, 2018 photo, horses are rescued during a fire at a recycling plant on the outskirts of Ciudad Juarez, Mexico. Juarez authorities declared an environmental emergency due to harmful particulate matter in the smoke, and people in its path were advised to stay inside, shut windows and doors and not use air conditioners under any circumstances. (Photo by Christian Torres/AP Photo)

A boy poses for photos near a field of blooming tulips on display in the Emirgan Park in Istanbul, Wednesday, April 18, 2018. Every April Istanbul celebrates the coming of spring with the annual Tulip Festival, now in it's 11th year. Parks and gardens all across Istanbul come alive with the flowers bright colours attracting tourists and local visitors. (Photo by Emrah Gurel/AP Photo)

Tourists stand to have their photo taken with cardboard cutouts of Britain's Prince Harry and his fiancee Meghan Markle, that a television company were using to film a programme in London, Thursday, May 3, 2018. The couple are due to get married in Windsor on Saturday May 19. (Photo by Matt Dunham/AP Photo)

A riot policeman wears a helmet painted by a demonstrator during a protest in Managua, Nicaragua May 2, 2018. (Photo by Oswaldo Rivas/Reuters)

A girl from a homeless family, that was living in the building that caught on fire, sits on her mattress donated by well-wishers in front of a church at Largo do Paissandu Square in Sao Paulo, Brazil May 2, 2018. (Photo by Nacho Doce/Reuters)

Supporters of Venezuela's President Nicolas Maduro holding a cardboard cut-out and a painting depicting Venezuela's late President Hugo Chavez attend a campaign rally in La Guaira, Venezuela May 2, 2018. (Photo by Carlos Garcia Rawlins/Reuters)

A border patrol agent apprehends a woman and a man after they were caught illegally crossing into the U.S. border from Mexico near McAllen, Texas, U.S., May 2, 2018. (Photo by Adrees Latif/Reuters)

Activists from People for the Ethical Treatment of Animals (PETA) demonstrate during the Volkswagen Group's annual general meeting in Berlin, Germany, May 3, 2018. (Photo by Axel Schmidt/Reuters)

A demonstrator with his face painted like a character from the movie “Avatar” carries a burning tire during a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, May 3, 2018. (Photo by Ibraheem Abu Mustafa/Reuters)

Palestinians with their faces painted like characters from the movie Avatar take part in a protest demanding the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, May 3, 2018. (Photo by Ibraheem Abu Mustafa/Reuters)

A young female elephant, injured after being caught in a snare trap, receives treatment from a team of government and university veterinarians at the Saree Elephant Training Center in Saree, Aceh province, Indonesia May 3, 2018 in this photo taken by Antara Foto. (Photo by Reuters/Antara Foto/Ampelsa)

A participant sprays water on an honour guard before the ceremony of laying flowers at a World War Two memorial in Stavropol, Russia May 3, 2018. (Photo by Eduard Korniyenko/Reuters)

A woman walks past servicemen of the self-proclaimed Donetsk People's Republic (DNR), who take part in a rehearsal for the Victory Day parade in Donetsk, Ukraine on May 3, 2018. (Photo by Alexander Ermochenko/Reuters)

Relatives mourn as they watch the body of Umar Kumhar, a civilian who according to local media was killed during clashes with Indian security forces near the site of a gun battle, during his funeral at Pinjora village in Kashmir's Shopian district, May 3, 2018. (Photo by Danish Ismail/Reuters)

A girl dressed in traditional costumes takes part in the festivity of the Holy Cross to ask for a good rainy season in Panchimalco, El Salvador on May 3, 2018. (Photo by Jose Cabezas/Reuters)

Winnipeg Jets' Nikolaj Ehlers (27) attempts to deflect the puck past Nashville Predators goaltender Pekka Rinne (35) during the third period of Game 4 of an NHL hockey second-round playoff series in Winnipeg, Manitoba, Thursday, May 3, 2018. (Photo by John Woods/The Canadian Press via AP Photo)

In this April 26, 2018 photo, students hold a sign that reads in Spanish “It's not three, it's all of us” during a protest against the murder of three film students who have become emblematic of Mexico's missing, in Guadalajara, Mexico. Prosecutors said the three were abducted by the Jalisco New Generation Cartel because they were filming a school project at a house used by the rival Nueva Plaza gang. The students were using the residence because it belonged to one of their aunts. (Photo by Eduardo Verdugo/AP Photo)

A new exhibit celebrating the artistic legacy of MAD magazine that includes several examples of magazines over the years is displayed on Thursday, May 3, 2018, in Columbus, Ohio. “Artistically Mad: Seven Decades of Satire” opens at the Billy Ireland Cartoon Library & Museum at Ohio State University on Saturday, May 5, and runs through Oct. 21. The exhibit will include original drawings and paintings, displays of vintage MAD magazines and memorabilia such as trading cards and board games. (Photo by Andrew Welsh-Huggins/AP Photo)

A general view of the stage before Chanel's Cruise 2018/2019 fashion collection presented in Paris, Thursday, May 3, 2018. (Photo by Christophe Ena/AP Photo)

With the U.S. Capitol in the background, Kellye Sims flips her hair up as she basks in the sun, at the National Mall, during a record-setting heat wave in Washington, D.C. on May 3, 2018. (Photo by Kevin Lamarque/Reuters)